I recently was given a pioneer pl115-d turntable. It didn't come with a manual, and being somewhat new to the world of turntables, I was kind of surprised when it didn't turn on after I plugged it in. There is no power button that I can find. The only wire that I am not completely positive about what to do with is what I believe to be the "ground" wire. I know it needs to connect to something metal, but my stereo is mostly plastic. Any suggestions? Questions?